package com.itheima.security.springmvc.service;

import com.itheima.security.springmvc.model.AuthenticationRequest;
import com.itheima.security.springmvc.model.UserDto;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

/**
 * <p>
 * AuthenticationServiceImpl
 * </p>
 *
 * @author flyduck
 * @since 2023/11/18
 */
@Service
public class AuthenticationServiceImpl implements AuthenticationService {

    /**
     * 用户认证，校验用户身份信息是否合法
     *
     * @param authenticationRequest 用户认证请求，账号和密码
     * @return 认证成功的用户信息
     */
    @Override
    public UserDto authentication(AuthenticationRequest authenticationRequest) {
        //校验参数是否为空
        if (authenticationRequest == null
                || StringUtils.isEmpty(authenticationRequest.getUsername())
                || StringUtils.isEmpty(authenticationRequest.getPassword())) {
            throw new RuntimeException("账号或密码为空");
        }

        //根据账号查询数据库。这里模拟
        UserDto userDto = getUserDto(authenticationRequest.getUsername());

        //判断用户是否为空
        if (userDto == null) {
            throw new RuntimeException("查询不到该用户");
        }

        //校验密码
        if (!authenticationRequest.getPassword().equals(userDto.getPassword())) {
            throw new RuntimeException("密码错误");
        }

        //认证通过，返回用户信息
        return userDto;
    }

    //模拟用户查询
    public UserDto getUserDto(String username) {
        return userMap.get(username);
    }

    //用户信息
    private Map<String, UserDto> userMap = new HashMap<>();

    {
        Set<String> authorities1 = new HashSet<>();
        authorities1.add("p1");//p1默认和 /r/r1对应
        Set<String> authorities2 = new HashSet<>();
        authorities2.add("p2");//p2默认和 /r/r2对应
        userMap.put("zhangsan", new UserDto("1010", "zhangsan", "123", "张三", "133443",authorities1));
        userMap.put("lisi", new UserDto("1011", "lisi", "456", "李四", "144553",authorities2));
    }
}
